Power operated cultivator



April 28, 1931. -r. BROWN 1,802,370

POWER OPERATED CULTIVA'I'OR I Original Filed Feb. 10. 1928 2Sheets-Sheet 1 giiia 0? 1- J v/ 7 la 26 A m M a 5 I I 7 2 0 o 9 E. i

WIT/V555 BY dual 1424mm yj a/ ATTOPNEYS April 1931.

T. BROWN POWER OPERATED CULTIVATOR Original Filed Feb. 10. 1928 2sheets-sheet 2 Fri a 'rnnormus nnown,

lements such as cultivators or implementsisand has particularly theretoin various wa of different implements so i frame adapted to straddl[travels along the rows. Th

other cutters,

1 commonly it neeess I tainingthe characteristic features with the art,the horse p'aratively but in cross fre uently has Patented Apr. 28, 1931UNITED, S ATES m1:- oer-"loaf- HOLIHE; ILLINOIS. A

or new, rumors, assrenon conronarron or TO mum l7 comm. 0! m1!rowanornnarnn cunrrva'ronf Y Application filed February l0, was. Serialno. steam: Renewed same, as, use.

their progpb power. e develo tractors has been f0 vices for performingrequired a in farming of "the soil between -p r I am aware, prior tomypresent invention no entirely satisfactory means asbeen'devised forutilizing .'a farm tractor for soil tillage P p a l farm tractor is anexpensive machine, and, therefore, for economical reasons it is necessathat it be available fornse not only in' the usual farmin operations,but for purposes suc asanpperating ensilage corn ellers, other machinesused on or about farms, that are capable of being operated by power;also different farming operations require the use that it is frequentliynecessaryto substitute one attachment or another 'on the tractor, whichmakes any that tillage implements be so designed that they may be readilapplied to or removedfrom the tractor, w e still rothat make themperform satisfactorily the work f r which they are intended.

Considering particularly the cultivation of the soil, as is well knownto those f drawn cultivator a wheel wer one or more rowsgeneral'lv inuse comprises of plants an'd'equip' with shovel carryin rigs that tillthe soil between the rows an throw ittoward the plants as the machine 0rows extending one way across the proximately straights-o that there iscomlittle occasion for'dodging plants that may be out of line by lateraldeflection of the path followed by thecultivator rigs, cultivation therows are not apt to be so straight, and therefore, the operator occasionto move the rlgs late'ra y to avoid damaging plants field are usuallyap- Jments. Also,

. unsatisfactory for various amiliar tachnient to that are out of line.Obviously, therefore, it is necessary that the operator have a clearview of the rows andof the rigs so that he may properly guide thecultivator. Furthermore, owing to inequalities of the mglround there isre orlesstilting of the tiyator in one tion or another, and provisionmust be made for proper o ration of the cultivating devices notwi andingsuch tilting moveit is necessary to provide; means for raisingandlowering'the rigs as occasionmay require.

I Heretofore it has been proposed to provide a upower operatedcultivator by making the c tivating devices in the form of anattachnient adapted to be applied to the front portion of the frame of atractor so as to form a unitary machine, the cultivating rigs beingattached to an frame structure secured to and so ported b the frontportion 70 of the tract r e. 's arrangement is reasons and-particularlyit necessitates p ac e cultivator'so that their shovels are ack of thefront wheels their being unfavorably lat' movement-of the rnnmng overuneven ground. Obviously, if the rigs are located at or near thetransverse vertical plane of the front traetor wheels they will rise andfall with the latter wheels, causing uneven cultivation, ated if therigs are connected with the tractor frame atpoints forward of suchplane. L ocati the rigs back of the front tractor whee is objectionablebecause it interferesafiected by the osciland this is accentuwith'theirvisibility, making itnnore diflicultx for the operator to follow therows and dodge g t e plants.

V Another objection tomakin cultivating'a I aratns. in: theform of anat- 90 W n s vr y the tractor frame is the app cation to or movalplainlyattachment from the tractor frame require the expenditure ofconsiderable and efiort, and after the attachment-has been removed it isquite cumberson a d dificult to handle, either for putting it in storageor replacing it on the tractor.

lthasalsobeenpmposedtoattachacul- 100 of'the tractor, to avoid 75tractor frame due to] tivator comprising a frame and drugs 'blewheelstothefrontofatractonandusingthe dlngihle wheels ofthecultivatorfor steering the tractor as well as the cultivator. This alsoj: bare; ittates placing back 0 steeringwheels, andastheco mfinedmachineisverysl:-!.=|L 3 1' theother 'ckl tododgep ts. Insuch machines, there ore, itis practically necessarytomounttherigssothattheymayheswnnglaterallyinunisonwith the turning ofthewheelsinsteering. Inthis ofmachine,aswellasintheonefirstreerredto,thecultivatorpartofthemachineisnot stably supportedon theground, andconsequently when the man disconnected the urltivator is tohandle.

lhave vm'edthattheo'ectionsto i til-linorcanheavoi gdeerlmportan H 'hlmakinfi'hecultivatorasaseparateunithavinga stasupportofimownonthegrounthso thatitmaintainsitsnormal'onregardlessofwhetheritheconncctedwiththetractorornot,and whichthecultivator-or umtcanrea 'yb'econnected with or from a powerunit,suchasafarmtractor,infrontthereof, in such manner as to hero'pelled thereby, andto derive power theregom for raisingor loweringthe Furthermore, such con nections SltOlild :suchastoholc}l the tillageunitagainst ateralswmgmg' wit -to thepowerunigsothathymounting e umtondsupports,suc ascaster ofmchcharacterastoperr ditit torespond to lateraldeflection of the tractor in steering, the tillage unit will heguidedhythetractonandduetoitslocation madvaneeofthe wheelsofthetractor,it may be shifted quickly to one side or the other to dodge plankwithout its being as to turn the steering wheels to any {click courseofcatillie tractor, may ept practi y stra' ht the rows, notwitlntandingthe of the rigs to dodge plants. one of the important of thisarrangement is that it provides for loca rigs ahead of the swa s-m thelllage' ,unit is fr dntan rearwheels,the

atpointsbetwecnsuch wheehwlxretheyareleastafectedbyfiltof umt,andasthetractormay $5M movement of the two units the ,derstood isonly thculti to bulge e u r Fig.5isapartial longitudinal vertical secknown halfrevolution clutch, is mounted on the frame of the tillage unit and isflexibly connected with a' dn element on the power unit so that notzvilhstanding relative driving connections are not disturbed. When the twounits are disconnected the tillage unit maintains its normal position onits ground engaging supports, which, as has been stated, are prefera lyin the form of caster wheels, so that it may be readily moved away forstorage until it is again required for use, when it may easily be movedinto place in front of the tractor to be again connected with it. v Theconnections uired are simle and can easily be made y one person. Kite!the removal of the tillage unit the tractor is at once ready for anyother use to which it may be desired to put it.

Having now given a brief general dascription of the nature of myinvention I shall proceed to a detailed description of the embodimentthereof illustrated in the accompanying drawings, which it should beonone of a variety of ways in which such invention may be incorporatedin an o rative machine or im lement. shoul be understood also that termcultivator as used in this specification and in the appended claims isemployed in a generic sense to comprehend not on] tillage implements ofthe type commonly own as cultivators, but also all other implements oflike general character to which my improvements magl be applicable.

the accompanying dra 1 is a plan view showing 7 e two units consti w myimproved implement assembled in operative relation to each other, therear portion of the tractor broken awa Fl g. 2 is a side elevation ofthe parts shown in Fig. 1, the heingshown in their inoper'ative orposit] Fig. 3 is a side elevation of the complete implement showing therigs in their operative f Fig. 4 is a detail showing the devices forconnecting the rigs with the frame of the or cultivator unit;

tional view ill the preferred arrangement for vertically inde denfly ofeach other;

Fig. 6 is a vertical on on line 6-6 of Fig. 7, showing the clutchmechanism that forms part ofthe power actuated meansforraisingandloweringtherigs; and FFig. 7is a vertical section on line77 of Refernng' to the (111m in which the cultivator unit as an entiretyis indicated by A, and the power unit or tractor as an entirety isindicated by B, 10 indicates the tractor frame which is supported at therear adjusting the rigs on oneor more tractor shown is of the swung backand forth 'fffll'm of steeringmeans, as my shaft is back of theradiator.

;.=:between thetwo rows being cultivated, while Q versal oint 20 onpropelling wheels 11 and at'the front which is supported upon fourcasterfwheels w ee The mounted respectively upon the front and rear tres-wheeled or trien cycle type, that is to sa d' In e illustratedoenstruction each of such it is provide with two propelling whee at therear and side members is composed of angle irons 22, 23 dis with asingle centrally located steering'element' at the front which'in' thepresent inother, and spaced as ort distance apart. Be-

stance is-shown as comprising two small tweenthe ront ends of each airof angle irons 22, 23 is secured a brac et 24 in t e wheels set closetogether at o osite sides of the longitudinal center lineo e tractor andform of a casting provided with a vertical sleeve 25 which forms abearin for the arranged to beturned for steeringlgurposes by a commonsteering connection. 5 indie portion 26 of a-caster whee support, t eintermediate ortion 27 of which is ofiset desired,

however, a single steering wheel could be laterally, while its lowerend'portion 28 is bent. horizontally to form a journal for a used. -Inthe arrangement shown there is a caster wheel 29. A collar 30 on eachcaster vertical steering's mdle 18 arrange'd to be turned by means 0 anarm 14 pivoted at 15' wheel support below the sleeve 25 holds suchsleeve up in its roper position. The offset to the frame of the tractor,and adapted to be by a steerin rod 16 which at its rear end isconnector? with a rtion 27 ofeac caster wheel sup ort isto crank 17.Said crankis swung back and provide clearance for the wheel, am suchoffforth about .a transverse axis by the usual :set portions areinclinedrearwardly so that worm gearing operated by rotation of a the casterwheels trail'back of thee indles 26 osed oppositely to each steering 0st'18 which ispreferably' rovid- .as the machine progresses and res ilyswing ed with t e usual hand wheel The ustrato one side or'the otherinresponse to lateral tion. is intended to represents conventionalmovements of the cultivator frame. Between the rear ends of each pair fangle irons 22 and 23 are secured brackets 31, similar to the brackets24, and provided with sleeves 32 that form bearings for the spindleportions 33 of the caster wheel supports that carry rear caster wheels34 The mounting of these caster wheels is substantially the same as thatof the front caster wheels, and, therefore, need not be described indetail. I prefer, however, to make the front caster wheels somewhat larer in diameter than the rear caster wheels ecause when themachine in inoperation most of the strain is transmitted to the front part of thecultivator frame and such strains are better sustained by the largerwheels.

The .two sidemembers frame are cross-connected angle bar 35' which islocated preferably about midwa between the ends of said side members, asest shownin Fig. 1 and also the angle irons 23 at opposite sides of themachine are connected by a cross-bar 3t .referabl in its ends t at rightangles and bolted or riveted to the vertical. flan irons 23'. Nearoneend '0 the bar23 it is provided with a strap 37 offset at its-inner endto form a yoke which receives the outer BItLEliPOYtlOII of a radius bar38 which is pivo y' connected with the bar. 36 and strap 37 by a bolt39, as shown in Fig. 1. The radius bar 88 extends inwardly from thepivinvention is not concernedwith the giaarticular devices used for thatpur I veshown atrac- "tor of the tricy e -t pe the cultivator unitillustrate is intended for two-' row cultivation, in which case thefront wheel or wheels of the tr actortravel in the space the propellingwheels would travel in the spaces between such rows and the adjoiningrows at opposite sides thereof. My invention may, however, also-beapplied to machines designed for cultivating three or-more rows, andobviously insuch cases a tractor of appropriate design having ,dirigiblefront wheels would be employed. It is believed to be unnecessary todescribe the construction of the tractor in detail, as it may be .of any0. proved design provided with power take-o connections so that powormay be furnished for operating the ower lift mechanism. It will sufliceto en t at in the illu'str 'dconstruction 19 in icates-a' power takeoffshaft which is connected with the power plant of the tractor so that itis rotatedthereby. The forward end of this uare and it is adapted to fittelescopically in a square socket carried by a uniby which itisoperatively' connected with a wet shaft 21, best shown in Fig. 1. Thisaft extends forward and, is adapted tobe connected with the power liftmechanism on the cultivator unbifas wille the form of a flat bar havingbe more fully hereinafter descri Th ot 39 to the longitudinal centerline of the usual radiator 21' is provided at the front machine where 1t18 connected by a pivot 40 with the front portion of-the tractor frame10., The radius bar, therefore, constitutes a vertically swin linkconnection tween thecentero the portionof the cultivator unit, whichpermits of the tractor and the usual internal combustion motorisinounted on the tractor-frame The motor is not shown as it may be ofany approved type.

The cultivator unit A comprisesa frame 7 d tgortions of the side membersof the frame.

two parallel of the cultivator by a transverse of the angle tractor unitand a side IudS 54 are also shifted lengthwise of the bar may beprovided with a series of spaced holes to receive the rear ends of saidbraces. Since the cultivator shown in the drawings is intended fortwo-row cultivation, it is equipped with four cultivator rigs 56 whichare pivotally connected at their forward ends with the hangers 53 toswing vertically but not laterally, by means of draft links 57 pivotedat 58 to the rigs and at 59 to the hangers, as shown in Figs. 2 and 4.The several rigs are connected with the rock shaft 52 so that the may beraised or lowered in unison by rocking said shaft, and the connectionsfor that purpose preferably include means by which the several rigs maybe adjusted vertically independently of each other, as will now bedescribed, but it should be understood that the construction shown isnot claimed herein as it constitutes the subject-matter of a separateapplication for patent.

As shown in Figs. 4 and 5, each of such connections comprises an arm 60non-rotatablysecured to the rock shaft, preferably by a clamp 61tightened by a bolt 62. The shaft 52 is preferably square incross-section, and it is obvious that. the arms 60 may be adjustedlongitudinally of said shaft and will be swung vertically by the rockingthereof.

Each of said arms projects rearwardly from the shaft and is providedwith a screwthreaded head 63 in which works a threaded sleeve 64, bestshown in Fig. 5, the purpose of which will be presently explained. Eacharm 60 is provided with a pair of parallel lift bars 65, one at eachside thereof, and pivotally connected thereto by pivots 66 adjacent tothe rockshaft 52, so that said bars may be swung vertically to varytheir angular relation to the arms 60. The rear ends of each pairof barsare connected with a cultivator rig 56 by means of ,9. depending link67, the lower end of. which pivotally connected with a lug 68 at theforward end of the rig, while the intermediate portion of said link isconnected with an intermediate portion of the rig by a rod 69 and yoke70 with which said rod is adjustably connected by threads 71. By thisconstruction vertical swinging of the lift bars 65 will raise or lowerthe rig with which they are connected,

and it will be apparent that by angularly adjusting the lift bars-65with reference to the arm 60 with which they are associated the rig maybe vertically adjusted without rocking the rock shaft 52. In order thatthe lift bars 65 may be actuated by the shaft 52 it is necessary to holdsaid bars normally in fixed relation to the arm 60; and for this purposeI provide a bolt 72 which extends upwardly through the sleeve 64 and iskeyed thereto so that by rotating said bolt the sleeve may be rotated. Awasher 73 is placed on the lower end of the bolt 72 between its head 74and the lower end of the sleeve 64, which washer overlies the lowermargins of the lift bars 65, and engage portions 7 5 that project fromsuch margins and form rocker bearin for the washer on said lift bars. Acup-s aped washer 76 is laced on the bolt 72 above the upper end 0 thesleeve 64, which washer also engages rocker bearings 77 that projectfrom the upper mar ins of the lift bars 65, as shown in Fig. 5. ecuredupon the upper end of the bolt 72 is a crank 78, by means of which thebolt 72 may be rotated, and between said crank and the cup washer 76 isa spring 79 which. through the cup washer 76 exerts downward pressure onthe lift bars 65. By this construction the lift bars 65 are held againstdownward swinging about the pivot 66, but may swing upward against thetension of the spring 79 to permit the rig to spring upward should itsshovels encounter some root or other obstacle, but as soon as theobstacle has been passed the rig will drop back to its normal positionwith the lift bars 65 resting on the washer 73. This upward movement of.the lift bars is, of course, independent of the arm 60 with which it isassociated. To separately adjust a given rig the bolt 7 2 is rotated bymeans of the crank 78 to adjust the sleeve 64 and the arm 60, therebychanging the angular relation of the lift bars 65 to said arm, whichraises or lowers the rear ends of said lift bars and consequently raisesor lowers the ri without rocking the rock-shaft 52. By roc 'ng saidshaft, however, the lift bars 65 of the several rigs may be swung upwardor downward, thereby raising or lowering the rigs in unison.

The rock shaft 52 is rocked to raise or lower the rigs in unison bypower operated mechanism mounted on the cultivator unit and actuated bypower from the tractor unit, such power, operated mechanism beingsimilar in general design to those shown in my pending applications,Serial Nos. 126,122, filed July 31, 1926, and 128,929, filed August 13,1926, although the construction shown difi'ers somewhat in detailtherefrom. So far as my present invention is concerned, any suitablepower lift mechanism of the type referred to may be employed, but Iprefer to use the mechanism shown. Such power lift mechanism comprises atransversely disposed shaft 80 having a crank 81 at one end thereof, asshown in Fig. 1. This shaft is mountd on the cultivator unit and its end0 posite the crank 81 extends into a clutch housing 82 preferablysupported by the transverse bars 35, 36 as shown in Fig. 1. Within thishousing is a clutch member 83 having connected thereto or formedintegral therewith a worm wheel 84 journaled on the shaft 80 so that itand the clutch member 83 may normally ro tate independently of theshaft. The worm wheel 84 is engaged by a worm 85 carried by a shaft 86that extends fore and aft and 1s connected at its rear end by auniversal joint 87 with the forward end of the power shaft 21. By thisarran ement, since the power shaft 21 is constant y driven when themotor is in operation, the clutch member 83 will also be constantlydriven. Such clutch member is of the t e havin internal corrugations 88aroun its mar m, such as are commonly used in connection with power liftplows, and is ada ted to cooperate with a clutch member 89 eyed on theshaft and provided with a rocking arm 90 having a roller 91 adapted tobe moved into or out of engagement with the corrugations 88 by therocking of said arm. A spring 92 tends normally to hold the roller 91 inengagement with said corrugations as usual. The clutch member 89 isprovided with concave recesses 93 in its margin at diametricallyopposite points, and the arm 90 is provided with proecting ends 94, 95that extend out beyond and adjacent to said recesses, as shown in Fig.7. A swinging trip arm 96 carried by a shaft 97 is provided with aroller 98 adapted to enter the recesses 93 under the influence of aspring 99, also shown in Fig. 7 The arrangement is such that when theroller 98 enters one of the recesses 93 it will engage one or the otherof the ends 94, 95 of the arm 90 and rock said arm against the tensionof the spring 92 to move its roller 91 out of engagement with thecorrugations 98, thereby disconnecting the two clutch members. Byrocking the shaft 97 to swing the arm 96 upward out of the recess 93 thearm 90 will be released and the roller 91 be moved into engagement withone of the corrugations 88 consequent upon the movement of the arm 90effected by the spring 92. Whenever the trip arm 96 is actuated toconnect the clutch members its roller 98 will ride around on the outermargin of the clutch member 89 until such clutch member has made a halfrevolution, when said roller will drop into the opposite recess 93 anddisengage the clutch members. Obviously, when the clutch members areconnected, since the clutch member 89 is keyed on the shaft 80, saidshaft and the crank 81 will be given a half revolution and will thenstop until the trip arm 96 is again actuated. The shaft 97 is rocked toactuate the trip arm 96 through an u wardly projecting arm 100 carriedby sai shaft, which arm has a rearwardly extending rod 101 that extendsto a point convenient to the operators seat. Thus the operator byactuating the arm 100 may at any time connect the clutch members toeffect the rotation of the shaft 80 and crank 81.

The crank 81 is operatively connected with the rock shaft 52 byconnections that include means for adjusting the extent to which saidrock shaft is rocked u on each half revolution of the shaft 80, w ichconnections, however, are not herein claimed as they constitute thesubject-matter of a separate application. Briefly explained, theycomprise a pitman 102 connected at its war end with the crank 81 and atits forward end with a screw-threaded collar 103 that travels on ascrew-threaded shaft 104 mounted in a bracket 105that is non-rotat ablymounted on the shaft 52. Manifestly by adjusting the position of thecollar 103 toward or from the rock shaft 52 the extent to which saidrock shaft is rocked by the operation of the crank 81 may be varied. Thecollar 103 is non-rotatably supported, and it is adjusted alon the screw104 by rotating said screw, which may be accomplished from the driversseat by means of a rod 106 connected at its forward end with the upperend of said screw by a universal coupling 107. Said rod extends back toa. point near the drivers seat 108 where it is provided with a crank 109by which it may be rotated. The rear portion of said rod is supported bya bracket 110 shown in Fig. 3. The usual steering wheel by which thefront wheels of the tractor are steered is shown at 111 in Fig. 3. I

It will be noted that thepower lift mechanism is'supported on thecultivator unit, but by reason of the flexible connections provided bythe universal joints 20 and 87 which connect it with the source of poweron the tractor unit, the driving connections are not affected by rockingor tilting of the cultivator unit with reference to the tractor. Also,when the cultivator unit is disconnected from the tractor the power liftmechanism remains with it, the driving connections being disconnected ateither end of the shaft 21, which is preferably telescopically connectedwith the ower take-oi shaft 19 of the tractor or wit the worm shaft 86of the power lift mechanism.

\Vhen the two units are operatively connected as described thecultivator unit, although separately sup orted stably on the ground, isheld against ateral swingin with reference to the power unit and is guied by the steering of the latter unit by means of the steering wheel orwheels thereof. F urthermore, each unit is free to rock or rise and fallinde endently of the other, and either side of t e cultivator unit mayrise or fall dueto irregularities in the ground without raising orlowering the other side. As has been pointed out, the connection of therigs to a ground supported cultivator unit located in advance of thepower or propelling unit not only locates them where they can at alltimes be seen clearly by the operator, and

Where the respond readily to the lateral deflection o the course of thepropelling unit in steering it, but also removes them from the influenceof rising, falling or rocking movement of the power unit so that theirproper operation is not disturbed thereby. So far ground independentlyof the as I am aware an im lement having these characteristics is broaly new in the art, and the claims hereinafter made are therefore to begenerically construed. While I have shown and described the cultivatorunit as comprising a frame supported upon four caster wheels, since Irefer such arrangement, three caster whee or other equivalent supportscapable of permitting lateral movement of the cultivator unit inresponse to steering changes of the propelling unit could be used, inwhich case the ground engagin members should be arranged to support 31ocultivator frame stably independently of its connection with thepropelling unit.

What I claim as my invention and desire to secure by Letters Patent, is-

1. A farm implement comprising a power unit including a frame supportedon propelling and steering wheels, a tillage unit including a frame staly supported on the ground independently of the ower unit in advancethereof and provide with tillage devices,

1 and means detachably connecting said units together and serving'tohold the tillage unit against lateral swinging with respect to theower'unit, whereby the tillage 111i; is guided y the steering of t epower unit.

2. A farm implement comprising'a power unit including a frame supportedon propelling and steering wheels, a tillage unit including a framestably supported in advance of the power unit on caster Wheels and pro:vided with tillage devices, and means detachably connecting said unitstogether and serving to hold the tillage unit against lateral swingingwith respectto the power unit, whereby the tillage unit is guided by thesteering of the power unit.

3. A farm implement comprising a power unit ineluding a frame supportedon propelling and steering wheels, a tillage unit including a framestably supported on the wor unit in advance thereof and provide withtillage devices, and means connecting said units together to permit thetillage unit to rise and fall relatively to the power unit, andmeanwhile holding the tillage unit against lateral swinging with respectto the power unit, whereby the tillage unit is gulded by the steering ofthe power unit.

4. A farm implement comprising a power unit including a frame supportedon propelling and steering wheels, a tillage unit 'ineluding a framestably supported on the ground independently of the power unit inadvance thereof and provided with tillage devices; and means connectingsaid units together to permit the tillage unit to rock with respect tothe power unit about a longitudinal axis, and meanwhile holding thetillage unit against lateral swinging with respect to D the power unit,whereby the tillage unit is guided by the steering of the power unit.

5. A farm implement comprising a power unit including a frame supportedon propelling and steerin wheels, a tillage unit including a frame sta1y supported on the ground independently of the ower unit in advancethereof and provided with tillage devices, and means connectingsaid'units to ther to cause the tillage unit to be pushe bythc powerunit while permitting rocking thereof about a'longitudinal axis at oneside or the other of the longitudinal center line of the power unit, andfor holding the tillage unit against lateral swinging with respect tothe power unit, whereb the tillage unit is guided y the steering of t epower unit.

6. A farm implement comprising a power unit including a frame supportedon propelling and steering wheels, a tillage unit including a framestably supported in advance of the power unit oncaster wheels andprovided with tillage devices, and means connecting said units togetherto permit the tillage unit to rise and fall relatively to the powerunit, and meanwhile holding the tillage unit against lateral swin 'ngwith respect to the powerunit, where y the tillage unit is guided by thesteering of the power unit.

7 A farm implement comprising a power unit including a frame supportedon propelling and steering wheels, 0. tillage unit including ,a framestably su ported on caster wheels independently of t e power unit inadvance thereof and provided with tillage devices, and means connectingsaid units together to cause the tillage unit to be pushed y the powerunit while permitting rocking thereof about a longitudinalaxis at oneside or the other of the longitudinal center line of the power unit, andmeans for holding the tillage unit against lateral swingin with respectto the power unit, whereby tie tillage unit is guided by the steering ofthe power unit.

8. A farm implement comprising a power unit including a frame supportedon propelling and steering wheels, a tillage unit in- -cluding a framestably supported on the ground independently of the power unit and 1nadvance t ereof, to be pushed thereby, tillage devices connected withthe latter frame and engaging the soilin advance of the steering axis ofthe steering wheel, and means detachably connectinguslaid units togetherto permit relative wor g thereof, and serving to hold the tillage unitagainst lateral ;.winging with respect to the power unit, whereby thetillage unit is the power unit.

9. A farm implement comprising a power unit including a frame supportedon propelling and steering wheels, 1:. tilla e unit including a framestably supporte on caster guided by the steering of .r

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wheels independently of the power unit and, in advance thereof, to bepushed thereby, till age devices connected .with the latter frame andengaging the soil in advance of the steering axis of the steering wheel,and means detachably connecting said unitsto'gether to permit relativerocking thereof, an serving to hold the tillage unit against lateralswinging with respect to the power unit, whereby the tillage unit isguided by the steering of the power unit.

10. A farm implement comprisi a power unit including a frame supporte onpropelling and steering wheels, :1 tillage unit including a frame stablysupported on the ground independently of the power unit and in advancethereof, to be pushed thereby, tillage devices connected with the latterframe and engaging the soil in advance of the steering axis of thesteering wheel, and means connecting said units together to permit thetillage unit to rise and fall with respect to the power unit, andserving to hold the tillage unit against lateral swinging with respectto the power unit, whereby the tillage unit is guided by the steering ofthe power unit.

11. A farm implement comprising a power unit including a frame supportedon pro 1- ling and steering wheels, a tillage unit we ud ing a framestablty supported on caster wheels independently o the power unit and,in ad vance thereof, to be pushed thereby, tillage devices connectedwith the latter frame and engagin the soil in advance of the steeringaxis of the steering wheel, and means connecting said units together topermit the tillage unit to rise and fall with respect to the power unit,and serving to hold the tillage unit against lateral swinging with resto the power unit, whereby the tillage unit is guided by the steering ofthe power unit.

12. A farm implement comprising a power unit including a frame sup rtedon rope]- ling and steering wheels, a tillage unit including a framestably supported on front and rear caster wheels independently of thepower unit and in advance thereof, tobeushed thereby, tillage devicesconnected with the latter frame and engaging the soil between the frontand rear caster wheels, and means connecting said units together topermit the tillage unit to rock about transverse and longitudinal axeswith respect to the power unit, and serving to hold the tillage unitagainst lateral swinging with respect to the power unit, whereby thetillage unit is guided by the steering of the power unit.

13. A farm implement comprising a power unit including a frame supportedon propelling and steer ng wheels, a tillage unit including a framestably supported on the ground independently of the power unit and inadvance thereof, to be pushed thereby and rovided with verticallymovable tilla devices, means detachably connecting sai units toling andsteering wheels, a tillage unit including a frame stably supported onthe ground, in advance of the power unit to be pushed thereby,vertically movable tillage devices connected with the latter frame,means connecting said units together to permit the tillage unit to rockabout transverse and longitudinal axes relatively to the power unit, andserving to hold the tillage unit against lateral swingin with respect tothe unit, whereby Sic tillage unit is gui ed by the steering of thepower unit, power lift mechanism, including lifting means for thetillage devices mounted on the frame of the tillage unit, and flexiblemeans connecting said power lift mechanism with a source of power on thewer unit for operating said power lift mec nism therefrom.

15. A farm implement comprising a power unit including a. framesupported on propelling and steering wheels, a tillage unit inwereludinga frame stably supported on the 7 ground independentl of the power unitin advance thereof, an provided with tillage devices, and meansdetachably connecting said units together meanwhile holding the tillageunit against lateral swinging with respect to the power unit butpermitting the tillage unit to rock with respect to the power unit,comprising a vertically swinging member pivotally connected with thepower unit and with a side portion of the frame of the tillage unit.

16. A farm implement comprising a power unit including a frame supportedon propellin and steering wheels, a tillage unit inclu ing a framestably supported in advance of the power unit on front and rear casterwheels, and provided with tillage devices, and means detachablconnecting said units together meanwhile olding the tillage unit againstlateral swinging with respect to the power unit but permitting thetillage unit to rock with respect to the power unit, comprising avertically swinging member pivotal'ly connected with the power unit andwith a side portion of the frame of the tillage unit.

17. A farm implement comprising a power unit including a frame supportedon propelling and steering wheels, a tillage unit including a framestably supported in advance of the power unit on front and rear casterwheels, and provided with tillage devices,

means detachabl connecting said units to gether meanwhi e holding thetillage unit aga nst lateral swinging with respect to the power'unit butpermitting the tillage unit to rock with respect to the power unit,comprising a vertically swinging member pivotally connected with thepower unit and with a side portion of the frame of'the tillage unit, andforwardly diverging push rods pivotally connected with the power unitand with opposite side portions of thetillage unit to swing vertically.

18. A cultivator unit comprising a frame stably supported on the ground,tillage dev ces connected with said frame to move vertically, meansmounted on said frame by power from a propelling unit to raise and lowerthe tillage devices, and means for detachably connectin said cultivatorunit in advance of a prope ling and steering unit, to push saidcultivator unit and hold the same against lateral swinging with respectto, the propelling and steering unit and meanwhile permit the cultivatorunit to rock relatively thereto about longitudinal transverse axes.

19. A cultivator unit comprising a frame stably supported on the ground,tillage devices connected with said frame to move vertically,' meansmounted on said frame operable by power from a propelling unit to raiseand lower the tillage devices, and meansfor detachably connecting saidcultivator unit in advance of a propelling and steering unit, to

push said cultivator unit and hold the same propelling and steering unitand meanwhile permit the cultivator unit to rock relatively theretoabout a longitudinal axis at either side of the cultivator unit. I

20. A cultivator unit comprising a frame stably supported on the ground,tillage devices connected with said frame to move vertically, ble toraise and lower the tilla devices, and means for detachably connectingsaid cultivator unit in advance of a propelling and steering unit topush said cultivator unit and hold the same against lateral swingingwith res t to the propelling and steering against lateral swinging withrespect to the meanwhile permit the cultivator .unit'to' rockrelativelythereto vertically and about 'a'longitudinal axis at either side of thecultivator unit, comprising a vertically swingin member pivotallyconnected with the cult1vat0r unit at one side thereof and adapted to bepivotally connected with the propelling and steering unit, andvertically swinging push rods adapted to connect the opposite sides ofthe cultivator unit with the propelling and steering unit.

21. A farm implement comprising a power unit including a frame supportedon-propellin and steering wheels, a tillage unit inclu ing a framesupported on the ground in advance of the power unit and propelled meansmounted. on said frame operathereby, tillage devices connected with thelatter frame, and transversely extending means constitutin a pivotalconnection between said units t at serves to hold the tillage unitagainst lateral swinging with respect to the power unit, whereby thetillage unit is unit.

22. A farm implement comprisin a power unit including a frame supporteon propelling and steering wheels, a tillage unit arranged to bepropelled thereby, includin a frame having wheels engaging the groun inadvance of the power unit, and provided with tillage devices, and atransverse link ivotally, connecting said units and serving to hold thetillage unit against lateral swinging with respect to the power unit,whereby the tillage unit is guided by the steering of the power unit.

23. unit including a frame supporte on propelling and steering wheels, atillage unit arranged to be propelled thereby, including a frame havingsupportin means engaging the ground in advance 0 the power unit, andprovided with tillage devices, and transversely extending meanspivotally connecting said units together to permit the tillage unit torise and fall relatively to the ower unit, and serving also to hold thetillage unit against lateral swinging with respect to the powerunit,rwhereby the tillage unit is guided by the steering of the powerunit.

24. A farm implement comprisin a power unit including a frame supporteon propellin and steering wheels, a tillage unit arranged to bepropelled thereby, including a frame having supporting means engagingthe ground inadvance of the power unit, a provided with tillage devices,and transguided by the steering of? the power A farm implement comprisina power versely extending means pivotally connecting said units togetherto permit the tillage unit to rock with respect to a longitudinal axis,and serving also to hold the tillage unit against lateral swinging withrespect to the power unit, whereby the tillage unit is guided by thesteering of the power unit.

25. A farm implement comprisin a power unit including a frame supporteon propelling and steering Wheels, ia tillage unit arranged to bepropelled thereby, including a frame having supportin mea'ns engagingthe ground in advance 0 the power unit, and rovided with tillagedevices, and means serv ngto hold the tillage unit against lateralswinging with respect to the wer unit, whereby the tillage unit is guied by the steering of the power unit, said means comprising a transverselink pivotally connected at its ends to the ower unit and the tillageunit, respective y.

26. unit including aframe support the power unit about pelling andsteering wheels, 9. tillage unit arranged to be propelled thereby,including a frame having supporting means engaging the ground in advanceof the power unit, and provided with tillage devices, and a verticallyswinging transverse link pivotally connected with said "units to permitthe tillage unit to rock about a longitudinal axis at one side or theother of the longitudinal center line of the power unit, and also tohold the tillage unit against lateral swinging with respect to the powerunit, whereby the tillage unit is guided by the steering of the powerunit. 7

THEOPHILUS BROWN.

pelling and steering wheels, a tillage unit arranged to be propelledthereby, including a frame having supporting means engaging the groundin advance of the power unit,

4 and provided with tillage devices, and a vertically swingingtransverselink pivotally connected with said units to permit the tillageunit to rock about a longitudinal axis at one side or the other of thelongitudinal 10 center line of the ower unit, and also to hold thetillage unit against lateral swinging with respect to the power unit,whereby the tillage unit is guided by the steering of the power unit.

15 THEOPHILUS BROWN.

CERTIFICATE OF CORRECTION.

Patent No. l, 802,370. Granted April 28, 931, to

THEOPHILUS BROWN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 7,line 122, claim 8, for the word "working" read rocking; page 8, line 80,claim 14, strike out the comma after "ground"; page 9, line 25, claim18, after the word "longitudinal" insert the word and; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 4th day of August, A. D. 1931.

Wm. A. Kinnan, (Seal) Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION.

Patent No. l,802,370. Granted April 28, K931i, to

THEOPHILUS BRQWN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 7,line 122, claim 8, for the word "working" read rocking; page 8, line 80,claim 14. strike out the comma after "ground"; page 9, line 25, claim18, after the word "longitudinal" insert the word and; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 4th day of August, A. D. 1931.

Wm. A. Kinnan, (Seal) Acting Commissioner of Patents.

